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[crypto] Generalise x509_parse_bit_string() to asn1_bit_string()

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2012-05-14 09:54:19 +01:00
parent 7deb610881
commit 4aad46ac70
5 changed files with 119 additions and 126 deletions
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15
src/crypto/rsa.c
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@@ -241,7 +241,7 @@ static int rsa_parse_integer ( struct rsa_context *context,
*/
static int rsa_init ( void *ctx, const void *key, size_t key_len ) {
struct rsa_context *context = ctx;
const struct asn1_bit_string *bit_string;
struct asn1_bit_string bits;
struct asn1_cursor modulus;
struct asn1_cursor exponent;
struct asn1_cursor cursor;
@@ -274,17 +274,10 @@ static int rsa_init ( void *ctx, const void *key, size_t key_len ) {
asn1_skip ( &cursor, ASN1_SEQUENCE );
/* Enter subjectPublicKey */
asn1_enter ( &cursor, ASN1_BIT_STRING );
/* Check and skip unused-bits byte of bit string */
bit_string = cursor.data;
if ( ( cursor.len < sizeof ( *bit_string ) ) ||
( bit_string->unused != 0 ) ) {
rc = -EINVAL;
if ( ( rc = asn1_integral_bit_string ( &cursor, &bits ) ) != 0 )
goto err_parse;
}
cursor.data = &bit_string->data;
cursor.len -= offsetof ( typeof ( *bit_string ), data );
cursor.data = bits.data;
cursor.len = bits.len;
/* Enter RSAPublicKey */
asn1_enter ( &cursor, ASN1_SEQUENCE );